.card {
    width: 350px;
    height: 200px;
    background: linear-gradient(135deg, #1A1F31, #4A4E60);
    border-radius: 15px;
    padding: 20px;
    color: white;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.chip {
    width: 60px;
    height: 40px;
    background: linear-gradient(135deg, #D4AF37 30%, #E0C68D 70%);
    border-radius: 10px;
    position: absolute;
    top: 20px;
    left: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.logo {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 25px;
    font-weight: bold;
}

.card-number {
    margin-top: 60px;
    font-size: 1.6em;
    letter-spacing: 2px;
    text-align: center;
}

.expiration {
    position: absolute;
    bottom: 20px;
    left: 20px;
    font-size: 1.2em;
    text-align: left;
}

.design {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: -1;
}

@media (max-width: 400px) {
    .card {
        width: 80%;
    }
}

#change-card-btn {
    background-color: #2185d0;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s, box-shadow 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    margin: 30px 0;
}

#change-card-btn:hover {
    background-color: #1e70c1;
}

#change-card-btn:active {
    transform: scale(0.95);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.notification {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
    border-radius: 5px;
    padding: 10px 15px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    font-size: 16px;
    display: flex;
    align-items: center;
    margin-top: 10px;
    margin-bottom: 20px;
}

.notification p {
    margin: 0;
}
